I got the chance to introduce my Dad to Dream Theater this weekend. I bought him "Dream Theater: Live at Budokan". He seemed to really enjoy the parts we watched. Its fun to introduce him to new stuff that I like, most of the time he likes it as well. Anyway, its the least I can do. I was very lucky to have been exposed to so much music as a kid.
Dream Theater also has a new album out called "Octavarium"